000 AGXX40 KNHC 080832 MIMATS Marine Weather Discussion NWS National Hurricane Center Miami FL 432 AM EDT Sat Apr 8 2017 Marine Weather Discussion for the Gulf of Mexico, Caribbean Sea, and Tropical North Atlantic from 07N to 19N between 55W and 64W and the Southwest North Atlantic including the Bahamas. ...GULF OF MEXICO... Surface high pressure has settled in across the N central Gulf where a 1021 mb high is centered just offshore of S central Louisiana and extends ridge SE through the Straits to a cold front across the SE Bahamas and E Cuba. This is producing anticyclonic flow across the basin, with strongest winds 15-20 kt around the periphery of the basin, at 15-20 kt, and mainly from SW FL coastal waters across the Straits and off the NW coast of Yucatan. Seas generally 5-6 ft in these areas. A weak pressure pattern is expected to develop today as the front shifts slightly SE and the pres gradient behind it relaxes slightly across SE portions. Moderate to fresh southeast return flow will set up over the NW Gulf this evening through Sunday ahead of a cold front advancing in the southern Plains, while fresh easterly flow sets up across the E Gulf Sunday night and Monday as the front moves into central Texas. Models show front stalling across central Texas Tue and retreating NW as next frontal systems develops across the Srn Plains mid week. Warm moist return flow Mon and Tue across the cool shelf waters of Texas and LA will lead to possibility of fog across the coastal waters. ...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... A cold front has pushed SE across the NW Caribbean and extends across Ern Cuba near from 21N76.5W SW where it become diffuse between the Caymans and Honduras. Moderate to fresh Ne to E flow prevails NW of the diffuse boundary with seas generally 4-5 ft. Atlc ridge has shifted E into the N central Atlc and Gulf high is now influencing pres gradient across the Carib, with peak nocturnal winds currently approaching 25-30 kt off of Colombia. The front will soon stall across far E Cuba and NW central Carib with Gulf high shifting NE and along mid Atlc coast as inverted troffing develops SE of stalled front across the Atlc, between 60W and 70W. This to maintain a modest pres gradient across the basin through Tue. As the high shifts NE a strong pres gradient will develop between the high and the old front to produce a swath of strong NE winds extending into the Bahamas and Cuba. Nocturnal pulses of strong NE winds will spread from Cuba SW and into the NW portions Sun, Mon and Tue nights to build seas to at least 6 ft each early morning. ...SW N ATLANTIC INCLUDING THE BAHAMAS... Cold front is slowly forward progress across the Atlc and now nearly bisects offshore zones from 30N68W to E Cuba near 21N76.5W. Scattered thunderstorms persist just ahead of the front mainly N of 25N. Fresh to strong NW winds are occurring behind the front N and 29N where seas are 8-11 ft in building NW swell E of 76W. Elsewhere W of front fresh NW to N winds have built across the Bahamas and FL coastal waters and are producing a next pulse of wind swell that will affect coastal waters and generate small surf along the coasts, possibly all the way into far SE Fl. The front will weaken and stall next 48 hours from near 30N61W to E end of Cuba. As mentioned above, inverted troffing is expected to develop SE of the stalled front across Mona Psg and Hispaniola as srn stream s/w energy digs mid-upper troffing across this region. Strong pres gradient to develop between stalled boundary and high pres shifting off mid Atlc coast and will produce elongated swath of NE winds to affect much of the NW half of the waters, and specifically SW through the Bahamas to Cuba. There is some potential for sfc low to develop within inverted troffing by mid week and produce area of winds around 30 kt and seas 10-12 ft invof 70w. Fresh to strong NE winds and building windsea to affect S half of FL coast Sun night through late Wed before a slow diminishing trend begins. $$ .WARNINGS...Any changes impacting coastal NWS offices will be coordinated through AWIPS II Collaboration Chat, or by telephone: .GULF OF MEXICO... None. .CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W... None. .SW N ATLANTIC INCLUDING THE BAHAMAS... None. $$ *For detailed zone descriptions, please visit: http://www.nhc.noaa.gov/abouttafbprod.shtml#OWF Note: gridded marine forecasts are available in the National Digital Forecast Database (NDFD) at: http://www.nhc.noaa.gov/marine/grids.php For additional information, please visit: http://www.nhc.noaa.gov/marine $$ .Forecaster Stripling. National Hurricane Center.